package com.github.byakkili.bim.core.support.netty;

import cn.hutool.system.SystemUtil;
import io.netty.channel.EventLoopGroup;
import io.netty.channel.epoll.Epoll;
import io.netty.channel.epoll.EpollEventLoopGroup;
import io.netty.channel.epoll.EpollServerSocketChannel;
import io.netty.channel.epoll.EpollSocketChannel;
import io.netty.channel.nio.NioEventLoopGroup;
import io.netty.channel.socket.ServerSocketChannel;
import io.netty.channel.socket.SocketChannel;
import io.netty.channel.socket.nio.NioServerSocketChannel;
import io.netty.channel.socket.nio.NioSocketChannel;
import io.netty.util.concurrent.DefaultThreadFactory;
import lombok.AccessLevel;
import lombok.NoArgsConstructor;

import java.util.concurrent.ThreadFactory;

/**
 * @author Guannian Li
 */
@NoArgsConstructor(access = AccessLevel.PRIVATE)
public class NettyEventLoopFactory {

    public static EventLoopGroup eventLoopGroup(int threads, String threadFactoryName) {
        ThreadFactory threadFactory = new DefaultThreadFactory(threadFactoryName);
        return shouldEpoll() ? new EpollEventLoopGroup(threads, threadFactory) : new NioEventLoopGroup(threads, threadFactory);
    }

    public static Class<? extends SocketChannel> socketChannelClass() {
        return shouldEpoll() ? EpollSocketChannel.class : NioSocketChannel.class;
    }

    public static Class<? extends ServerSocketChannel> serverSocketChannelClass() {
        return shouldEpoll() ? EpollServerSocketChannel.class : NioServerSocketChannel.class;
    }

    private static boolean shouldEpoll() {
        return SystemUtil.getOsInfo().isLinux() && Epoll.isAvailable();
    }
}
